B1101E Bearings for Alternator

Product catalog summary

Introduction
This document provides a comprehensive overview of the technological advancements and specifications of bearings used in alternators, highlighting their evolution from the 1970s to the 2010s. It focuses on the development of high-performance bearings that meet the demands of high temperature, speed, and environmental resistance.

Technological Trends and Needs
The document outlines the need for bearings that can withstand high temperatures and speeds, resist water and vibration, and provide long life and reliability. JTEKT has developed bearings that meet these requirements through extensive research.

Specifications and Features
The bearings are designed with non-contact seals (RU) and ultra-light contact seals (RD, RM) to enhance water resistance and sealing performance. They support temperatures up to 180ºC and incorporate new ether grease for improved high-temperature and speed performance. The bearings also feature anti-white structure flaking technology to enhance durability.

Materials and Construction
The bearings use SUJ2 material for the inner and outer rings, quenched and tempered for durability. The retainer is made from reinforced PA66, and the seals are crafted from heat-resistant nitrile rubber.

Testing and Performance
Various tests, including vibration, high-temperature/speed, and water resistance tests, demonstrate the bearings' capabilities. The RM seal shows superior water resistance, and the new grease significantly extends grease life compared to previous mineral oil-based greases.

Size and Load Specifications
The document lists available bearing sizes and their corresponding load capacities, providing detailed specifications for each model.

Conclusion
JTEKT's bearings for alternators are engineered to meet the rigorous demands of modern automotive applications, offering enhanced performance, reliability, and longevity.

Catalog excerpts

Bearings for Alternator JTEKT JTEKT CORPORATION

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Front bearing In general, bearings are used on the front and rear sides of the alternator (one bearing for each side ) in order to support the rotor. Ball bearings are used, except in some types of alternators. High-performance bearings are required to satisfy the high temperature and speed requirements as well as to resist water, vibration, etc. JTEKT has developed high-performance bearings for alternator based on the results of many years of research and offers an outstanding lineup. History of Development of Bearings for Alternator <Technological trends and needs for bearings> ,_I_„_I_ Compact...

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(1) Bearing specifications support high temperatures and speeds as well as providing white structure flaking resistance A new grease has been adopted to ensure high-temperature/speed performance and anti-white structure flaking properties required for alternator bearings. Example of high-temperature/speed performance test (dm*n*: 7.3 x 105, 170°C) (2) Supporting use in harsh external environments The adoption of the RM seal, featuring advanced water resistance, enables problem-free use of alternators in harsh external environments (water, dust, etc.) Amount of water (g) Example of water resistance...

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JTEKT www.jtekt.co.jp KOYO CANADA INC. 5324 South Service Road, Burlington, Ontario L7L 5H5, CANADA TEL : 1-905-681-1121 FAX : 1-905-681-1392 JTEKT NORTH AMERICA CORPORATION -Main Office-47771 Halyard Drive, Plymouth, Ml 48170, U.S.A. TEL : 1-734-454-1500 FAX : 1-734-454-4076 -Cleveland Office-29570 Clemens Road, P.O.Box 45028, Westlake, OH 44145, U.S.A. TEL : 1-440-835-1000 FAX : 1-440-835-9347 KOYO MEXICANA, S.A. DE C.V. Av. Insurgentes Sur 2376-505, Col. Chimalistac, Del. Alvaro Obregon, C.P. 01070, Mexico, D.F. TEL : 52-55-5207-3860 FAX : 52-55-5207-3873 KOYO LATIN AMERICA, S.A. Edificio...

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